FP6291 1MHz, 2A Step-Up Current Mode PWM Converter General Description The FP6291 is a current mode boost DC-DC converter. Its PWM circuitry with built-in 0.25Ω power MOSFET make this regulator highly power efficient. The internal compensation network also minimizes as much as 6 external component counts. The non-inverting input of error amplifier connects to a 0.6V precision reference voltage and internal soft-start function can reduce the inrush current. The FP6291 is available in the SOT23-6L package and provides space-saving PCB for the application fields. Features Adjustable Output up to 24V Internal Fixed PWM frequency: 1.0MHz Precision Feedback Reference Voltage: 0.6V (±2%) Internal 0.25Ω, 2.5A, 26V Power MOSFET Shutdown Current: 0.1μA Over Voltage Protection Over Temperature Protection Adjustable Over Current Protection: 0.5A ~ 2.5A Package: SOT23-6L Applications Chargers LCD Displays Digital Cameras Handheld Devices Portable Products Typical Application Circuit Last saved by Hsieh_hpThis datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Rev. 0.61 Website: http://www.feeling-tech.com.tw 1/8 FP6291 Function Block Diagram Pin Descriptions Name SOT23-6L Top View 1 GND 2 FB 3 AL986 LX 6 OC 5 VCC 4 EN No. I / O Description LX 1 O Power Switch Output GND 2 P IC Ground FB 3 I Error Amplifier Inverting Input EN 4 I Enable Control (Active High) VCC 5 P IC Power Supply OC 6 I Adjustable Current Limit (Floating Available) Last saved by Hsieh_hpThis datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Rev. 0.61 Website: http://www.feeling-tech.com.tw 2/8 FP6291 Marking Information SOT23-6L AL986 Lot Number Year Part Number Code Lot Number: Wafer lot number’s last two digits For Example: 132386TB 86 Year: Production year’s last digit Part Number Code: Part number identification code for this product. It should be always “AL”. Last saved by Hsieh_hpThis datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Rev. 0.61 Website: http://www.feeling-tech.com.tw 3/8 FP6291 Ordering Information Part Number Code FP6291LR-G1 Operating Temperature Package MOQ Description -40°C ~ 85°C SOT23-6L 3000EA Tape & Reel AL Absolute Maximum Ratings Parameter Symbol Conditions Min. Typ. Max. Unit Supply Voltage VCC 0 6 V OVP Voltage VOVP 0 27 V VLX 0 24 V 0 6 V LX Voltage EN,FB Voltage Power Dissipation PD SOT23-6L @TA=25°C 455 mW Thermal Resistance (Note1) θJA SOT23-6L +220 °C / W Junction Temperature TJ +150 °C Operating Temperature TOP -40 +85 °C Storage Temperature TST -65 +150 °C +260 °C Lead Temperature (soldering, 10 sec) Note1: θJA is measured in the natural convection at TA=25°C on a low effective thermal conductivity test board of JEDEC 51-3 thermal measurement standard. IR Re-flow Soldering Curve Last saved by Hsieh_hpThis datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Rev. 0.61 Website: http://www.feeling-tech.com.tw 4/8 FP6291 Recommended Operating Conditions Parameter Symbol Supply Voltage VIN Operating Temperature Range TA Conditions Ambient Temperature Min. Max. Unit 2.6 Typ. 5.5 V -40 +85 °C DC Electrical Characteristics (VCC=3.3V, TA=25°C,unless otherwise specified) Parameter Symbol Conditions Min. Typ. Max. Unit 5.5 V System Supply Input Input Supply Range VCC Under Voltage Lockout 2.6 VUVLO UVLO Hysteresis 2.2 V 0.1 V Quiescent Current ICC VFB=0.66V, No switching 0.16 mA Average Supply Current ICC VFB=0.55V, Switching 2.84 mA Shutdown Supply Current ICC VEN=GND 0.1 µA FOSC VFB=1.0V Oscillator Operation Frequency Frequency Change with Voltage 0.8 △f / △V VCC=2.7V to 5.5V Maximum Duty Cycle TDUTY 1.0 1.2 MHZ 5 % 90 % Reference Voltage Feedback Voltage VREF Line Regulation 0.588 0.6 0.612 V 0.05 VCC=2.7V～5.5V %/V Enable Control Enable Voltage VEN Enable sink current IEN Shutdown Voltage VEN 0.96 V 20 FB＜0.3V µA 0.6 V MOSFET On Resistance of Driver RDS (ON) ILX=0.1A Ω 0.25 Protection OVP Threshold Voltage VOVP 27 V OVP Sink Current ISINK 5 µA OCP Current IOCP Adjustable OCP Current IOCP OTP Temperature TOTP With External Resistor： 10k~100k 2 2.6 A 0.5 2.6 A °C +150 Last saved by Hsieh_hpThis datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Rev. 0.61 Website: http://www.feeling-tech.com.tw 5/8 FP6291 Function Description Operation The FP6291 is a current mode boost converter. The constant switching frequency is 1MHz and operates with pulse width modulation (PWM). Build-in 26V / 2A MOSFET provides a high output voltage. The control loop architecture is peak current mode control; therefore slope compensation circuit is added to the current signal to allow stable operation for duty cycles larger than 50%. Soft Start Function Soft start circuitry is integrated into FP6291 to avoid inrush current during power on. After the IC is enabled, the output of error amplifier is clamped by the internal soft-start function, which causes PWM pulse width increasing slowly and thus reducing input surge current. Current Limit Program A resistor between OC and GND pin programs peak switch current. The resistor value should be between 10k and 100k. The current limit will be set from 2.5A to 0.5A. Do not float or short to ground. This is a high impedance node. Keep traces at this pin as short as possible. Do not put capacitance at this pin. Over Voltage Protection (OVP) In some condition, the resistive divider may be unconnected, which will cause PWM signal to operate with maximum duty cycle and output voltage is boosted higher and higher. The power MOSFET will be turned off immediately, when the output voltage exceeds the OVP threshold level. The FP6291’s OVP threshold is 27V. Over Temperature Protection (OTP) FP6291 will turn off the power MOSFET automatically when the internal junction temperature is over 150°C. The power MOSFET wake up when the junction temperature drops 30°C under the OTP threshold temperature. Output Disconnect When power on and the EN pin will be pulled high. The FP6291 start up and operates. The external PMOS is turned on and current through it for output loading. While output loading is increase, output voltage is drop. When the FB pin voltage is under 0.3V, the EN pin sinks 20µA current, the external PMOS will be turn off. The output short condition will be disconnected. Last saved by Hsieh_hpThis datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Rev. 0.61 Website: http://www.feeling-tech.com.tw 6/8 FP6291 Application Information General Application Circuit General Boost Converter SCP Detect and Load Disconnect Last saved by Hsieh_hpThis datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Rev. 0.61 Website: http://www.feeling-tech.com.tw 7/8 FP6291 Package Outline SOT23-6L Unit: mm Symbols Min. (mm) Max. (mm) A 1.050 1.450 A1 0.050 0.150 A2 0.900 1.300 b 0.300 0.500 c 0.080 0.220 D 2.900 BSC E 2.800 BSC E1 1.600 BSC e 0.950 BSC e1 1.900 BSC L 0.300 0.600 L1 0.600 REF L2 0.250 BSC θ° 0° 8° θ1° 3° 7° θ2° 6° 15° Note: 1. Package dimensions are in compliance with JEDEC outline: MO-178 AB. 2. Dimension “D” does not include molding flash, protrusions or gate burrs. 3. Dimension “E1” does not include inter-lead flash or protrusions. Last saved by Hsieh_hpThis datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Rev. 0.61 Website: http://www.feeling-tech.com.tw 8/8